20
User Guide
Metrobility T3/E3 21
Acronyms and Abbreviations
This list defines the acronyms and abbreviations used in this guide.
AIS
Alarm Indication Signal
ANSI
American National Standards Institute
AWG
American Wire Gauge
B3ZS
Bipolar Three Zeroes Substitution T3 line coding
BNC
Bayonet-Neill-Concelman connector
BWDM
Bidirectional Wavelength Division Multiplexed
CLP
Copper Loopback
CSA
Canadian Standards Association
CSU
Channel Service Unit
DSU
Data Service Unit
E3
34.368 Mbps communications standard
F/O
Fiber Optic
FLP
Fiber Loopback
FPGA
Field-Programmable Gate Array
HDB3
High Density Bipolar Three Zeroes Substitution E3 line coding
IEC
International Electrotechnical Commission
ITU
International Telecommunications Union
LBK
Loopback
LBO
Line Build Out
LIU
Line Interface Unit
LK
Link
Mbps
Megabits per second
MM
Multimode
MTBF
Mean Time Between Failures
NRZ
Non-Return to Zero line coding
PBX
Private Branch Exchange
PWR
Power
RX
Receive
SM
Singlemode
T3
44.736 Mbps communications standard
TX
Transmit
UL
Underwriters Laboratories
VCXO
Voltage-controlled crystal oscillator
